package com.dsx.dsms.interceptor;

import com.dsx.dsms.pojo.User;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.Arrays;

/**
 * @author dsx
 */
public class LoginInterceptor extends HandlerInterceptorAdapter {

    /**
     * 在业务处理器处理请求之前被调用
     * 如果返回false
     * 从当前的拦截器往回执行所有拦截器的afterCompletion(),再退出拦截器链
     * 如果返回true
     * 执行下一个拦截器,直到所有的拦截器都执行完毕
     * 再执行被拦截的Controller
     * 然后进入拦截器链,
     * 从最后一个拦截器往回执行所有的postHandle()
     * 接着再从最后一个拦截器往回执行所有的afterCompletion()
     */
    @Override
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response, Object handler) throws Exception {

        HttpSession session = request.getSession();
        String contextPath = session.getServletContext().getContextPath();
        System.out.println("---------------> contextPath " + contextPath);
        String[] need = new String[]{"/order.html", "/testorder.html",
                "/fore_student_listExam", "/testorderSuccess.html", "/fore_student_RecentlyExam",
                "/admin_coach_test","/fore_student_RecentlyExam","/addComment","/coach_admin.html"
        };


        String uri = request.getRequestURI();
        System.out.println("1----------->uri  " + uri);
        uri = StringUtils.remove(uri, contextPath);
        System.out.println("2---------->uri  " + uri);

        if (Arrays.asList(need).contains(uri)) {
            User user = (User) session.getAttribute("student");
            if (user == null) {
                //客户端跳转
                response.sendRedirect("login.html?msg=-1");
                //服务端跳转
                return false;
            }
        }
        return true;
    }

    /**
     * 在业务处理器处理请求执行完成后,生成视图之前执行的动作
     * 可在modelAndView中加入数据，比如当前时间
     */

    @Override
    public void postHandle(HttpServletRequest request,
                           HttpServletResponse response, Object handler,
                           ModelAndView modelAndView) throws Exception {


    }

    /**
     * 在DispatcherServlet完全处理完请求后被调用,可用于清理资源等
     * <p>
     * 当有拦截器抛出异常时,会从当前拦截器往回执行所有的拦截器的afterCompletion()
     */

    @Override
    public void afterCompletion(HttpServletRequest request,
                                HttpServletResponse response, Object handler, Exception ex)
            throws Exception {

    }
}
